Average Weather at Atka Airport Alaska, United States
At Atka Airport, the summers are short, cold, and windy; the winters are long, very cold, and extremely windy; and it is overcast year round. Over the course of the year, the temperature typically varies from 30°F to 55°F and is rarely below 22°F or above 60°F.
Based on the tourism score, the best time of year to visit Atka Airport for warm-weather activities is for the entire month of August.
The warm season lasts for 2.4 months, from July 8 to September 20, with an average daily high temperature above 51°F. The hottest day of the year is August 14, with an average high of 55°F and low of 47°F.
The cold season lasts for 4.4 months, from November 30 to April 11, with an average daily high temperature below 40°F. The coldest day of the year is January 24, with an average low of 30°F and high of 36°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
At Atka Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year at Atka Airport begins around August 26 and lasts for 3.6 months, ending around December 13. On October 14, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 42% of the time, and overcast or mostly cloudy 58% of the time.
The cloudier part of the year begins around December 13 and lasts for 8.4 months, ending around August 26. On July 6, the cloudiest day of the year, the sky is overcast or mostly cloudy 85% of the time, and clear, mostly clear, or partly cloudy 15% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Atka Airport varies throughout the year.
The wetter season lasts 8.1 months, from July 16 to March 21, with a greater than 33% chance of a given day being a wet day. The chance of a wet day peaks at 43% on November 28.
The drier season lasts 3.9 months, from March 21 to July 16. The smallest chance of a wet day is 23% on May 5.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 40% on November 19.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Atka Airport experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year at Atka Airport. The most rain falls during the 31 days centered around August 29, with an average total accumulation of 3.1 inches.
The least rain falls around May 18, with an average total accumulation of 1.3 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Atka Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.2 months, from November 27 to April 3, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 27, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 7.8 months, from April 3 to November 27. The least snow falls around August 6, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day at Atka Airport varies extremely over the course of the year. In 2018, the shortest day is December 21, with 7 hours, 42 minutes of daylight; the longest day is June 21, with 16 hours, 47 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:14 AM on June 17, and the latest sunrise is 3 hours, 31 minutes later at 9:46 AM on December 30. The earliest sunset is at 5:24 PM on December 12, and the latest sunset is 5 hours, 38 minutes later at 11:02 PM on June 24.
Daylight saving time (DST) is observed at Atka Airport during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level at Atka Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
Humidity Comfort Levels
The average hourly wind speed at Atka Airport experiences extreme seasonal variation over the course of the year.
The windier part of the year lasts for 7.7 months, from September 15 to May 6, with average wind speeds of more than 16.9 miles per hour. The windiest day of the year is November 24, with an average hourly wind speed of 21.7 miles per hour.
The calmer time of year lasts for 4.3 months, from May 6 to September 15. The calmest day of the year is July 21, with an average hourly wind speed of 12.0 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Atka Airport varies throughout the year.
The wind is most often from the east for 5.0 days, from February 14 to February 19, with a peak percentage of 26% on February 18. The wind is most often from the west for 10 months, from February 19 to December 31, with a peak percentage of 44% on October 28. The wind is most often from the north for 1.5 months, from December 31 to February 14, with a peak percentage of 27% on January 1.
Atka Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 2.2 months, from July 24 to September 29, with an average temperature above 47°F. The day of the year with the warmest water is August 25, with an average temperature of 49°F.
The time of year with cooler water lasts for 5.2 months, from December 15 to May 21, with an average temperature below 41°F. The day of the year with the coolest water is March 1, with an average temperature of 38°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is at Atka Airport throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Atka Airport for general outdoor tourist activities is for the entire month of August, with a peak score in the second week of August.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Atka Airport for hot-weather activities is from early August to early September, with a peak score in the first week of August.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season at Atka Airport typically lasts for 5.9 months (180 days), from around May 3 to around October 31, rarely starting before April 8 or after May 24, and rarely ending before October 8 or after November 28.
Time Spent in Various Temperature Bands and the Growing Season
Growing Degree Days
The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.
The brighter period of the year lasts for 3.9 months, from April 22 to August 17, with an average daily incident shortwave energy per square meter above 3.8 kWh. The brightest day of the year is May 28, with an average of 4.7 kWh.
The darker period of the year lasts for 3.6 months, from October 29 to February 17, with an average daily incident shortwave energy per square meter below 1.3 kWh. The darkest day of the year is December 20, with an average of 0.5 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Atka Airport are 52.220 deg latitude, -174.207 deg longitude, and 184 ft elevation.
The topography within 2 miles of Atka Airport contains very significant variations in elevation, with a maximum elevation change of 1,138 feet and an average elevation above sea level of 263 feet. Within 10 miles contains very significant variations in elevation (4,757 feet). Within 50 miles also contains extreme variations in elevation (5,000 feet).
The area within 2 miles of Atka Airport is covered by shrubs (48%), water (27%), and grassland (15%), within 10 miles by water (43%) and shrubs (31%), and within 50 miles by water (93%).
This report illustrates the typical weather at Atka Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
Atka Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
In this case, the only station close and reliable enough to use as a fallback is Adak Airport.
Time zones for aiports and weather stations are provided by AskGeo.com .